He was a regular dragon in WC2 and we killed him easily :P
And Cata heroics became 20 min AOE fests once you outgeared them as well. Before FL was even out they nerfed them and even when the nerfs came out they were already so easy that I remember wondering what the point of the nerfs was. It was the culture shock of going from doing dungeons in full ICC gear (which is what, 10 tiers above what they were tuned for?) to doing them in quest blues and greens, plain and simple.
You're doing it wrong. Arch isn't there for you to gear up. The epic drops were intentionally made super rare so that it would be a big deal if you ever got one.